False license plate detection method and device based on line segment detection

Abstract

The invention provides a false license plate detection method based on line segment detection. The method includes: collecting or inputting a video image; performing license plate detection on the video image to obtain a license plate area; and expanding the license plate area according to the expansion coefficient to obtain a region of interest , perform tilt correction and zooming on the region of interest, obtain the zoomed image, and perform line segment detection on the zoomed image; cluster the detected line segment, obtain the clustered line segment, according to the length of the line segment and whether the four corners of the license plate are located in the clustered line segment On the same side of , filter the clustering line segment, and output the filtered clustering line segment; take the clustering line segment as the reference line segment, obtain the frame line segment combination of the reference line segment, and filter the frame line segment combination; if there is no frame line segment combination, then The license plate area is a real license plate, otherwise the license plate area is a false license plate. Compared with the existing license plate recognition technology, it can effectively detect false license plates.

Description

technical field [0001] The invention relates to image processing, intelligent transportation and license plate recognition, in particular to false license plate detection in license plate recognition. Background technique [0002] With the increasing modernization of cities, the number of motor vehicles continues to increase, and intelligent transportation systems are playing an increasingly important role. License plate recognition technology is an important part of modern intelligent transportation systems and has a wide range of applications. [0003] The main task of the existing license plate recognition technology is to detect and recognize the license plate and its characters, and it does not intelligently integrate the license plate anti-counterfeiting function. Today's license plate recognition system is facing the challenge of "false license plate" attacks, such as using mobile phones, tablet computers, etc. to display real license plate pictures, in order to achi...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to solve the problem of false license plate detection in the actual scene

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